Commercial Locksmith in Naperville, IL

Commercial doors in Naperville

Commercial locksmith work covers storefront and office entries, rear service doors, interior office and storage locks, and the key systems that tie them together, from a simple keyed-alike set to a master key system where each key opens only the doors it should.

Some of Naperville's commercial buildings carry landmark status, which changes how an entry door can be handled. In 2024 the Beidelman Buildings at Washington Street and Jackson Avenue became the city's first landmarked commercial structures: a 1928 three-story Gothic Revival block and a mid-19th-century two-story "workshop" later faced with brick. The 1898 Old Nichols Library, landmarked in 2017, now fronts a mixed-use development built to its rear and south.

Landmark and historic district rules

Alterations to an individual landmark need a Certificate of Appropriateness under the Historic Preservation Ordinance, Title 6, Chapter 11 of the Municipal Code, the same certificate that applies in the Naperville Historic District. There, in-kind replacement of a primary-façade door can be approved administratively by the Zoning Administrator, while major primary-façade work goes to the Historic Preservation Commission. A business in a landmark should check with the city before changing an entry door. A rekey leaves the door itself unchanged. This is general information, not legal advice.

Staff and tenant turnover

• Staff who leave. Every key that walks out with a former employee is a reason to rekey the doors it opened.
• Shared buildings. In mixed-use and multi-tenant buildings, the landlord usually controls the street entry and common doors while each tenant handles its own suite. Agree in writing who can authorize changes to which lock.
• Moving in. A business taking over a space should rekey on the first day, since the previous tenant, cleaning crews and contractors may all still have copies.

Details that help a business request

Give the building address and suite, which doors are involved (front, rear, interior, shared), how many keys are out and who holds them, whether the building is a landmark or in the historic district, and the name of the person who can authorize the work. For key changes after turnover, see lock rekeying. The Naperville page lists the landmark buildings alongside the residential districts.